17 research outputs found
Effects of Anti-NRP1 Monoclonal Antibody on Cell Proliferation,Migration and Apoptosis of Melanoma B16F10 Cells
目的研究靶向神经菌毛素1(nEurOPIlIn1,nrP1)单克隆抗体(nrP1 MAb)对黑色素瘤细胞b16f10增殖、迁移和凋亡的影响,并探讨其作用机制。方法 SdS-PAgE检测神经菌毛素1单克隆抗体的纯度;蛋白质印迹法、免疫荧光和免疫组化检测神经菌毛素1单克隆抗体的特异性和b16f10细胞及其移植瘤上神经菌毛素1的表达;四甲基偶氮唑蓝法、划痕实验、AnnEXIn V-fITC/PI双标记流式细胞术等方法检测不同浓度神经菌毛素1单克隆抗体对黑色素瘤细胞增殖、迁移和凋亡的影响;蛋白质印迹法检测神经菌毛素1单克隆抗体作用后细胞内相关信号蛋白的表达。结果纯化的神经菌毛素1单克隆抗体具有高纯度和特异性,同时b16f10细胞及其移植瘤上神经菌毛素1高表达。神经菌毛素1单克隆抗体能有效抑制b16f10细胞的增殖和迁移,抑制作用呈时间和浓度依赖性(P<0.05)。神经菌毛素1单克隆抗体能显著诱导b16f10细胞凋亡,并呈剂量依赖关系(P<0.05)。抗体作用后b16f10细胞中磷酸化的AkT和Erk1/2表达下调,bCl-2和CASPASE 3蛋白表达下调,bAX蛋白的表达上调。结论纯化的神经菌毛素1单克隆抗体能有效地抑制b16f10增殖,迁移并明显诱导凋亡,其可能通过抑制膜上神经菌毛素1与相关细胞因子结合而减少其介导的PI3k/AkT和MEk/Erk1/2信号转导途径的活化来抑制细胞增殖和迁移,并通过bCl-2/bAX/CASPASE3途径诱导细胞凋亡,从而发挥其抗肿瘤作用。OBJECTIVE To investigate the effect of anti NRP1 monoclonal antibody( NRP1 mAb) on melanoma cell B16F10 proliferation,migration and apoptosis,and explore its mechanism.METHODS Western blot,immunofluorescent and immunocytochemistry staining were applied to determine the expression of NRP1 on B16F10 cells and its xenotransplanted tumors by NRP1 mAb.The proliferation,migration and apoptosis of melanoma cells were detected by MTT assay,the scratch test and Annexin V-FITC /PI double labeled flow cytometry after administration with different concentrations of NRP1 mAb.The expression level of some signal molecules was measured by Western blot.RESULTS The purified NRP1 mAb has high purity and specificity.B16F10 cells and its xenotransplanted tumors highly expressed NRP1.NRP1 mAb inhibit the proliferation and migration in a time-and dose-dependent manner( P < 0.05).Moreover NRP1 mAb induce apoptosis of B16F10 in a dose-dependent manner( P < 0.05).The results of western blot revealed down-regulated expression of p-Akt,p-ERK1 /2,Bcl-2 and caspase-3 and up-regulated Bax expression in B16F10 cells treated by NRP1 mAb.CONCLUSION The purified NRP1 mAb can effectively inhibit the proliferation and migration of B16F10 and induce apoptosis.Meanwhile,the changed expression of the proteins suggests that NRP1 mAb may inhibit cell proliferation and migration by ERK1 /2 and PI3 K /Akt pathway and induce cell apoptosis by Bcl-2 /Bax /caspase-3 pathway,consequencely playing anti-tumor role.国家自然科学基金资助项目(30973485;81172970); 福建省属公益类科研专项经费(2011R1039-1;2013J0138
预制装配式建筑施工常见质量问题与防范措施研究
在我国综合国力全面提升的带动下,使得建筑工程行业得到了明显的发展壮大,这样就使得大量的新兴建筑工程施工企业应时而生,从而加剧了建筑工程行业内部的竞争形势。预制装配式建筑工程模式是建筑工程行业快速发展的必然结果,针对预制装配式建筑我国相关行政机构也专门制定了诸多的政策,有效的推动了预制装配式建筑施工工作整体水平的提升,从而使得预制装配式建筑得以大范围的运用,并且取得了良好的成绩。建筑工程施工企业要想在严峻的行业竞争中长期处在不败的境地,那么最为重要的就是需要针对施工质量加以严格的把控,对施工过程中遇到的各种问题,利用有效的方式方法加以解决,促使施工单位能够获得更加丰厚的经济和社会收益。</jats:p
高体鰟鮍在加入个体数不同的群体时的选择
集群给动物带来安全、接触配偶机会等利益的同时,也存在增加竞争的风险。不同的物种以及生活史不同的阶段,动物会采取不同的集群策略。本研究设计实验,检验在繁殖期个体大小不同的高体鰟鮍对由同性个体组成的个体数不同的群体的偏好。结果显示,大个体雄性显著偏好于大的群体(第一次选择:V=72,n=12,P=0.0054;第二次选择:V=65,n=12,P=0.022),大个体雌性对不同大小的群体则无显著偏好(第一次选择:V=54,n=12,P=0.13;第二次选择:V=41.5,n=12,P=0.44);小个体雄性(第一次选择:V=59,n=12,P=0.0012;第二次选择:V=78,n=12,P=0.0013)与小个体雌性(第一次选择:V=75,n=12,P=0.0026;第二次选择:V=70,n=12,P=0.0083)均显著偏好于大的群体。这说明在选择加入某一群体时,大型和小型的雄性个体均主要考虑安全因素;而小型的雌性个体主要考虑安全因素,大型的雌性个体则同时考虑安全因素和繁殖竞争
Study on the Newly Occurred Soil and Water Loss on the Disturbed Lands
针对神府东胜煤田开采过程中所引发的严重新增水土流失问题,采用野外放水冲刷的试验研究方法,对神府东胜煤田扰动地面新增水土流失机理和流失量进行了初步研究。结果表明:在相同放水冲刷流量和坡度下,原始地面的平均土壤入渗率较扰动地面的增加30%;两种不同类型下垫面的径流量均随时间的增加而增加,冲刷的前6min,径流量均较小,且原始地面>扰动地面,在6min以后,径流量迅速增大,且原始地面<扰动地面,扰动地面的平均径流量较原始地面增加14%;原始地面的侵蚀产沙在整个放水冲刷过程中没有显著变化,基本维持在一个常数水平;扰动地面在放水冲刷0—15min的侵蚀产沙量较高,此后侵蚀产沙随冲刷历时的延长而下降并最终趋于稳定;扰动地面的平均含沙量较原始地面增加96%,平均产沙量增加89%;新增土壤流失量随放水流量和坡度的增大而增大,10°时,新增土壤流失量最大;同一坡度条件下,放水流量越小,土壤流失量增加的百分比就越大,反之则越小。Abstract:Based on the severe newly occurred soil and water loss caused by the mining exploitation in theShenfu-Dongsheng coal mining area,mechanism of newly occurred soil and water loss and soil loss tolerancewere studied by using field water discharge scouring experiments.The results showed that the average waterinfiltration rate of original soil increased by 30%compared to disturbed soil surface under the same flow discharge and slope;runoff rate increased with time duration under the different surface conditions.Aboutwithin 6minutes before at the beginning of scouring,runoff rate was all little and the runoff rate in originalsoil surface was more than that in disturbed soil surface,after 6minutes,runoff rate increased significantly,and the runoff rate in original soil surface was less than that in disturbed soil surface,the average runoff rateof disturbed soil surface increased by 14%compared to that in original soil surface;the sediment generationof original soil surface kept a constant level basically in the whole souring process,and obvious change ofsediment yield was not observed.The sediment generation of disturbed soil surface was highest within 0—15min,and then it decreased with time duration and tended to stable finally,the average sediment concentration increased by 96%and the average sediment yield increased by 89%compared to original soil surface;Newly occurred soil and water loss increased with flow discharge and slope increased and was the highest forslope with gradient of 10°.Under the same slope conditions,the percentages of soil loss increase were higherwhen flow discharge was smaller
高体鰟鮍在加入个体数不同的群体时的选择
集群给动物带来安全、接触配偶机会等利益的同时,也存在增加竞争的风险。不同的物种以及生活史不同的阶段,动物会采取不同的集群策略。本研究设计实验,检验在繁殖期个体大小不同的高体鰟鮍对由同性个体组成的个体数不同的群体的偏好。结果显示,大个体雄性显著偏好于大的群体(第一次选择:V=72,n=12,P=0.0054;第二次选择:V=65,n=12,P=0.022),大个体雌性对不同大小的群体则无显著偏好(第一次选择:V=54,n=12,P=0.13;第二次选择:V=41.5,n=12,P=0.44);小个体雄性(第一次选择:V=59,n=12,P=0.0012;第二次选择:V=78,n=12,P=0.0013)与小个体雌性(第一次选择:V=75,n=12,P=0.0026;第二次选择:V=70,n=12,P=0.0083)均显著偏好于大的群体。这说明在选择加入某一群体时,大型和小型的雄性个体均主要考虑安全因素;而小型的雌性个体主要考虑安全因素,大型的雌性个体则同时考虑安全因素和繁殖竞争
